Mine tunnel timbering structure



Mafch5, 1940- P. MOISSEEFF-MUSPRATT ,192,554

MINE TUNNEL TIMBERING STRUCTURE Filed April 26, 1939 3 Sheets-Sheet 1 V Fig. 1

Inventor By W% M Attorney Paul Moisseeff-Muspratt,

March 5, 1940.

P. MOISSEEFF-MUSPRATT MINE TUNNEL TIMBEBING STRUCTURE Filed April 26, 19 39 3 Sheets-Sheet 2 Inve ntor,

N PauIMOiSSeQff-Q I USPTQH,

3%; ,fkfiwL By Attorney.

March 1940- P. MOlSSEEFF-MUSPRATT MINE TUNNEL TIMBERING STRUCTURE Filed April 26, 1959 3 Sheets-Sheet 5 Fig. 9

Fig. 8

Paul Moisseeff-Mus Inventor. w

ratt Bympf 71 Attor ne y.

Patented Mar. 5, 1940 UNITED STATES PATENT OFFlCE 4 Claims.

1 ting up the structure to adapt it to irregularities in the alignment of the tunnel, and especially in the connections between the roof beams and the prop beams permitting rotation of the prop beams and safeguarding against the possibility of a prop beam being knocked from under a roof beam by a derailed car.

A further object is to ing a reinforcement of interlocking of the parts.

In the accompanying three sheets of drawings which form a part of this description,

Figure l is a plan view of two sections of a concrete timbering structure which embodies this invention.

Fig. 2 is a front elevation of the same.

Fig. 3 is a plan view to a larger scale of the reinforcing parts of a roof beam at one end with the concrete in section on the plane IlIIII of Figs. 4 and 5.

Fig. 4 is a section through the roof beam together with a portion of a prop beam on the planes IV- IV of Figs. 3 and 5.

Fig. 5 is a section through the concrete of the roof beam on the vert'cal plane V-V of Figs. 3 and 4.

6 is a section through the roof beam adjoining a strut on the plane VIVI of Fig. 7.

Fig; '7 is a section through the concrete of the same on the plane VIIVII of Fig. 6.

Fig. 8 is a side view of the lower end of a prop beam with an underlying concrete block and portion of a lower spacer beam.

Fig. 9 is a front View of block.

The structure comprises roof beams beams H under the roof beams, upper spacer beams l2 between the roof beams, base blocks I3 under the prop beams, and lower spacer beams I4, all preferably of concrete and reinforced to such extent as may be necessary or desirable. The roof beam is supportedby prop beams adjacent to the ends. All of the beams abut against each other with ball-and-socket joints. There are sockets l5 on opposite sides of each of the ends of the roof beams and ball or hemispherical ends [6 at the ends of the upper spacer beams.

provide a roof beam havthe prop beam and I0, prop truss design with suitable.

Connecting the opposite sockets is a hole l1 lined with an iron pipe l8. The pipe does not cometo the faces of the sockets and the entrances to the hole are flared. From the middle of the ball end of each spacer beam and leading out at the side of the beam is a curved hole l9 lined with a bent iron pipe 20. The pipe does not come to the face of the ball and the entrance to the hole is flared. If there is no spacer beam to be fitted into a socket, as is the case with the socket on one side of the first roof beam, the socket is covered with a perforated plate 2|. A flexible cable 22 is threaded through the hole connecting the sockets and the curved holes in'the ends of the abutting spacer beams or the perforated plate andsecured at the ends by clamps 23. By reason of the ends of the holes being flared where they come together, passage between them will not be cut off when the holes are not in close alignment.

There is a socket or concave seat 24 in the under side at each of the ends of the roof beams and a mating ball or convex end 25 at the upper end of each prop beam. Leading from the middle of each socket and coming out under the roof beam is a curved hole 2t lined with a bent pipe 27. The pipe does not come to the face of the socket and the entrance to the hole is flared. From the middle of the ball end of each prop beam and leading out at the side of the prop beam is a curved hole 28 lined with a bent pipe 29. The pipe does not come to the face of the convex end and the entrance to the hole is flared. A flexible cable 3!] is threaded through the curved holes in the roof beam and in the prop beam and secured at the ends by clamps 3|. By reason of the flaring ends of'the holes there may be some variation in the angle at which the prop beam meets the roof beam. without cutting oil the passageway between them for the cable.

There are sockets 32 on opposite sides of the base blocks and ball or hemispherical ends 33 at the ends of the lower spacer beams. Connecting the opposite sockets is a hole 34 lined with an. iron pipe 35. The pipe does not come to the faces of the sockets and the entrances to the hole are flared. From the middle of the ball and of each spacer beam and leading out at the side of the beam is a curved hole 36 lined with a bent iron pipe 31. The pipe does not come to the face of the ball and the entrance to the hole is flared. If there is no spacer beam to be fitted into a socket, as is the case with the socket on one side at the first frame, the socket is covered with a perforated plate. A flexible cable 38 is threaded through the hole connecting the sockets and the curved holes in the ends of the abutting spacer beams or the perforated plate and secured at the ends by clamps 39. The flaring ends of the holes permit the passing through of the cable when the alignment is not straight. The cables fit loosely in the holes and their ends may be welded to keep them from fraying.

The reinforcement of the roof beam is of parallel channel bars with webs 40, deep and preferably slightly fiaring sides M1, and flanges 42 formed by outwardly turning the edges of the sides. The webs of the channel bars are fastened together by rivets 43, one of which holds a strut 44 formed of bar iron with a quarter twist. A tension bar 45 is bent to the desired form with hooks at each end before assembling and then hooked around the ends of the channel bars, after which the strut is set in place and the channel bars are fastened together. The truss is thus formed. Additional reinforcing rods 46 in the form of links are set where needed, and in the form of double loops 4'! around the sockets, and the concrete is poured in a suitable mold. The hooks at the ends of the tension bar are further stiffened by reason of being embedded in the concrete.

I claim,

1. A mine tunnel timbering structure comprising roof beams and prop beams seated against each other with holes through the seats and emerging at the sides of the beams, cable threaded through the holes, and means for securing the cables at the points of emergence at the sides of the beams.

2. A mine tunnel timbering structure comprising concrete roof beams and prop beams seated against each other with curved holes through the seats and emerging at the sides of the beams, cables threaded through. the holes, and means for securing the cables at the points of emergence at the sides of the beams.

3. A mine tunnel timbering structure comprising concrete roof beams, prop beams, and spacer beams, seated against each other with ball-andsocket joints with holes through the seats of the joints and emerging at the sides of the beams, cables threaded through the holes, and means for securing the cables at the points of emergence at the sides of the beams.

4. A reinforced concrete roof beam supported at the ends with parallel reinforcing channel bars, means for fastening the channel bars together, a strut depending from between the channel bars, and a tension bar across the end of the strut and having its ends hooked around the ends of the channel bars within the concrete roof beam.

PAUL MOISSEEFF-MUSPRA'I'I. 

